Pressure applying mechanism for top rolls



NW. 10, 1942. c QLNEY PRESSURE APPLYING MECHANISM FOR TOP ROLLS Filed Jan. 21, 1941 3 Sheets-Sheet 1 INVEITI OR. Glam/ice 5017/ 81 mm Nov. 10, 1942. c, QLNEY 2,301,226

fRESSURE APPLYING MECHANISM FOR TOP ROLLS Filed Jan. 21, 1941 '3 Sheets-Sheet 2 INVENTOQR.

\ Clarewe 50275:

Nov. 10, 1942. I

c. E. OLNEY PRESSURE APPLYING MECHANISM FOR TOP ROLLS Filed Jan. 21, 1941 3 Sheets-Sheet 3 J42 J57 w J30 IIIIIIIIIII Jay 13a 1 .12 Clare/ice E. Glaze u Patented Nov. 10, 1942 UNITED STATES PATENT OFFICE PRESSURE APPLYDI G MECHANISM FOR TOP ROLLS Clarence E. omey. Woonsocket, R. 1., assignor to Whitin Machine Work corporation of Massac s, Whitinsville, Mass, at husetts 15 Claims.

This invention relates to spinning or drawing frames and to other similar machines in which drawing rolls and associated top rolls are used,

between which rolls slivers or rovings are drafted.-

It is the general object of my invention to provide improved pressure-applying mechanism for top rolls as thus used and particularly where at least four top rolls are arranged in a parallel assembly.

To the attainment of this general object, I provide improved means for applying and distributing pressure to the difierent top rolls, together with means for varying the distribution of pressure between different rolls. I also provide pressure-applying mechanism which can be easily removed as a unit from the drawing rolls when desired.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawings, in Which- Fig. 1 is a sectional side elevation of parts of a spinning frame embodying my improvements;

Fig. 2 is a view similar to Fig. 1 but showing certain parts in a different relation;

Fig. 3 is a side elevation of an inner saddle member and certain associated parts;

Fig. 4 is an end elevation, looking in the direction of the arrow 4 in Fig. 3;

Fig. 5 is a side elevation of an upper or outer saddle member;

Fig. 6 is a detail sectional View, taken along the line 6-6 in Fig. 5;

Fig. 7 is a sectional side elevation showing a modified construction of pressure-applying mechanism whereby the relative distribution of pressure to the different rolls may be varied;

Fig. 8 is a sectional side elevation showing an additional modification Fig. 9 is a sectional end elevation, taken along the irregular section line 9 -9 in Fig. 8;

Fig. 10 is a detail sectional plan view, taken along the line Ill-l 0 in Fig. 8;

Fig. 11 is a sectional side elevation of a pressure-transmitting member;

Fig. 12 is a sectional end theline I2-l2 inFig. 11;

Fig. 13 is a fragmentary sectional plan view, taken along the line l3-l3 in Fig. 12; and

Fig. 14 is a sectional side elevation showing my invention as applied to a five-roll structure.

Referring to Figs. 1 to 6, I have shown my inelevation, taken along vention embodied in a spinning or drawing frame comprising a roller beam 20 (Fig. 1) and supporting stands 2| for bearings 22 in which bottom or drafting rolls 25, 26, 21 and28 are rotatably mounted. Top rolls 30, 3|, 32 and 33 are associated in pairs with the bottom rolls 25 to 28. Slivers or rovings R are guided to the back rolls through the usual traversing trumpets or roving guides 35. Usual guide means, indicated, in part at 36, holds the top rolls in vertical alignment with their associated bottom or drafting rolls.

The parts thus far described are of the usual construction and in themselves form no part of my present invention, which relates particularly to means for distributing and proportionately applying pressure to the top rolls to 33.

For this purpose, I provide an outer saddle member (Fig. 1), an inner saddle member 42, a double bell-crank lever 44 pivoted at 45 to the inner member 42, a stirrup link 47 pivoted at 48 to the lower end of the bell-crank 44, and a cam lever 50 pivoted at 5| between the upper ends of the double bell-crank lever 44.

The outer saddle member 40 has a concave portion 40 (Figs. 1 and 5) at its front end adapted to rest on the middle journal 52 of the front top roll 30. The outer saddle member 48 also has a flat rear portion 40 adapted to rest on the middle journal of the back top roll 33. The inner saddle member 42 has a concave portion 42* adapted to rest on the middle journal of the second top roll 32 and has a flat bearing portion 42 adapted to rest on the middle journal of the third top roll 3|.

The outer saddle member 40 is grooved on its upper face, as indicated at 53 in Fig. 6, and the cam portion of the lever 50 is seated in the groove 53 and is held from lateral displacement thereby.

Any suitable means may be provided for applying downward pressure to the lower end of the stirrup link 41. For illustrative purposes, I have shown a pull rod (Fig. 1) mounted in a slot 6| in the roller beam 20 and having a hook 62 at its upper end engaging a cross pin 63 in the lower end of the stirrup link 41. A collar 64 limits downward movement of the pull rod 6|] when released, and downward pressure is supplied by a coil spring 65 interposed between upper and lower washers 66 and 61 loose on the rod 60. A nut 68 on the lower end of the pull rod may be adjusted to regulate the down pull of the spring 65.

The pressure of the spring 65 is applied to the saddle members 40 and 42 by throwing the cam lever 50 to the position shown in Fig. 1, and is released by throwing the lever 50 to the position shown in Fig. 2. In the latter position, the cross-pin .63 is low enough to clear the hook 62 'of a double link 76.

when the collar 64 on the pull rod engages the top surface of the roller beam 26,

With this construction, it will be clear that the downward tension of the spring 65 is transmitted through the stirrup link 41 to the double bellcrank lever 44, and that the downward pressure on the lever 44 is transmitted in part to the outer saddle member G9 through the cam lever 5, and in part to the inner saddle member 42 through the pivot-pin 45.

That part of the pressure which is applied to the inner saddle member 42 is unevenly distributed between the middle top rolls 3I and 32, with the larger part of the pressure being applied to the second top roll 32.

The pressure applied to the outer saddle member All i distributed between the front top roll 30 and the back top roll 33. In a construction as shown in Fig. 1, a somewhat larger proportion of this pressure is applied to the front top roll 3! It will be understood that the proportions of the parts may be varied, so that the relative distribution of pressure on the different top rolls may be well adapted to operating conditions.

A particularly desirable feature of my improved pressure-applying mechanism lies in the fact that when the lever 5!) is thrown to the inoperative position shown in Fig. 2 and the hook 62 is released, all parts of the pressure-applying mechanism may be removed from the top rolls as a unit, so that the top rolls may be easily cleaned or replaced as desired. I v v In Fig. 7, I have shown a modified construction in which provision is made for selectively modifying the distribution of pressure .to the different top rolls. In this form of my invention, I provide an outer saddle member 76 and an inner saddle member I I which are similar in construction and function to the saddle members All and 42 previously described. 7

A slotted bracket 12 is adjustably secured by a bolt I3 to the inner saddle member II, and the bracket has upstanding ears 14 which support a crosspin 115 which forms a pivot for the lower end The double link '76 has a connecting crosspin 78 on which a cam lever 86 is pivoted. The pin I8 also forms a pivotal support for the double upper ends of a stirrup link 82 having spaced sides 83 which embrace the saddle structure and having a crosspin 8d at its forked lower end adapted to receive a hook 85 corresponding to the hook I52 previously described.

The cam lever 8:! does not directly engage the outer saddle member as in the previous construction, but engages a bearing plate 81 having 2. depending projection 88, which directly engages the saddle If! in a longitudinal groove or top recess 89 thereof.

An adjusting screw 99 is mounted for rotation in the projection 38 but is held from axial movement therein by a collar SI. The screw 90 is threaded into a device 92, which device is loosely pivoted on the crosspin I5 previously described. The right-hand end of the bearing plate 8'Iis supported on the hub of the device 92. The cam lever 8 engages the bearing plate 81 between the point where the projection 88 engages the saddle Ill and the point where the plate Bl engages the hub of the device 92.

Downward pressure applied through the hook 85 to the link 82 is thus transmitted through the cam lever 89 to the bearing plate Bl and is distributed from the bearing plate through the projection 88 to the outer saddle member Ill, and

through the hub of the device 92, the crosspin 1'5 and the bracket l2 to the inner saddle member I I.

By adjusting the screw 90, the relative pressures applied to the inner and outer saddle members may be varied, and by adjusting the bracket 12 on the inner saddle member II the relative pressures on the two middle top rolls may be varied.

Furthermore, adjustment of the plate 3'! by the screw may be utilized to vary the relative pressures exerted on the front and rear top rolls by the outer saddle member Ill. By combining these two adjustments, desired variations in relative pressures can be secured within usual operating limits.

In the construction shown in Figs. 8 to 13, I provide an even more complete arrangement for varying the relative pressures on the diiferent top rolls. This construction comprises an outer saddle member IE! and an inner saddle member II, a cam lever Ie2, and a stirrup link 33, all of which correspond in function to similar parts previously described. The upper end of the stirrup link I03 is pivoted at M5 to the lower ends of spaced straps Hi6, which in turn are pivoted at their upper ends at I01 to the cam lever I2.

A guide-block H5 is slidably mounted on the inner saddle member Ifil, as shown in Figs. 8 and 10, and the lower portion of the block I Iii is threaded to receive an adjusting screw IE2, mounted for rotation in depending bearings H3 (Fig. 8) on the inner saddle member IGI. The screw-H2 is held from axial movement in the bearings II3 by a collar H4, and a spring Iliis provided to take up any lost motion between the threaded guide-block Ill] and the screw II2.

The guide-block IIli has vertical grooves Ht: (Fig. 10) at its opposite side to receive and guide the straps I06 which connect the stirrup link I03 to the cam lever I2. The cam lever I32 can thus be adjusted transversely of the top rolls by means of the adjusting screw H2, acting through the block IIIl, straps I 06 and pivot till.

A bearing plate I20 has a slotted connection to the inner saddle member IDI, and the plate may be retained in adjusted position by a clamping bolt I2I. The block II!) is deeply recessed in its upper portion to freely receive the inner saddle member IIlI, the bearing plate 12s and the clamping bolt E2 I, all as shown in Figs. 8 to An L-shaped pressure-transmitting member I30 (Figs. 8 and 11) is pivoted at I3I to the hearing plate I20, and said member is U-shaped in cross section in its upper portion as shown in Figs. 9 and 12. A lug I33 is partially sever d and bent inward from one of the side walls of the member I30, as shown in Figs. 12 and 13, and is slotted to receive a grooved collar I34 fixed on the inner end of an adjusting screw I35. The outer end of the screw I35 is engaged and supported by the down-turned outer end I3? (Fig. 11) of the member I30.

A slidable block I40 (Figs.'9 and 11) is mounted between the sides of the member 39] and is threaded on the screw I35. The upper surface of the block I49 engages the under side of the middle portion of the member I86, and the lower surface of the block Hill is received in the groove I42 in the upper face of the outer saddle member IE9. A spring I44 (Fig. 11), is mounted on the screw'Ibfi between the block Mil and the collar I34 and acts to take up lost motion between the block I40 and the screw I35.

The construction shown in Figs. 8 to 13 has the advantage of extreme flexibility in distributing the drafting pressure between the several top rolls. By adjusting the bearing plate I20, the distribution of pressures between the two middle top rolls may be varied; by changing the longitudinal position of the slidable block I40, the relative pressures on the front and back top rolls may be varied; and by adjusting the guide-block IIO, the position of the cam lever I02 may be varied to determine the relative pressures to be applied collectively to the front and back top rolls on one hand and the two middle top rolls on the other hand.

Each of the cam levers 50, 80 and I02 has a flat face at its maximum radius, which prevents accidental release of pressure. In any of the forms of my invention, the upper or outer saddle can be removed without removing the other parts'cf the pressure-applying mechanism from the frame.

In Fig. 14 I have shown a further modification of my invention by which the invention is adapted for use in drawing mechanism using more than four sets of rolls.

To the accomplishment of this result, I provide an outer saddle I 50 corresponding to the saddle I in Fig. 7 but directly engaging the front top roll I5I only. The rear end I52 of the saddle I50 extends through a projection I53 on a rear saddle I54 which is supported by the two back or rearmost top rolls I55 and I56. The part I52 of the outer saddle I 50 engages a lug I51 on the rear saddle I54 and thus applies pressure to the front top roll I5I and also to the two back top rolls I55 and I56.

Certain of the details shown in Fig. 7 are omitted in Fig. 14 for the sake of clearness, but the general construction is or may be substantially the same as in Fig. 7, except as above described. Similarly, an additional rear saddle may be used with any of the other constructions herein shown.

The term back top roll as used in the claims is to be understood as covering either one or both of the two rearmost rolls shown in Fig. 14.

All forms of my invention provide improved means for transmitting and distributing a single drafting pressure in varying proportions to each of four or more top rolls assembled in parallel relation as shown.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. In a drawing frame, means to apply pressure to parallel top rolls comprising an outer saddle engaging the front and back rolls, an inner saddle engaging the two middle rolls, a single pressure-applying device, and means to distribute the pressure in predetermined proportions to said outer and inner saddles.

2. In a drawing frame, means to apply pressure to parallel top rolls comprising an outer saddle engaging the front and back rolls, an inner saddle engaging the two middle rolls, a single pressure-applying device, and means to distribute the. pressure in predetermined proportions through said outer and inner saddles to all of said top rolls.

3. In a drawing frame, means to apply pressure to parallel top rolls comprising an outer saddle engaging the front and back rolls, an inner saddle engaging the two middle rolls, a single pressure-applying device, and means to dis- 7 3 tribute the pressure'in unequal predetermined proportions to said outer and inner saddles.

4. In a drawing frame, means to apply pressure to parallel top rolls comprising an outer saddle engaging the front and back rolls, an inner saddle engaging the two middle rolls, a single pressure-applying device, and means to distribute the pressure in predetermined proportions to said outer and inner saddles and in unequal proportions between the rolls engaged by each saddle.

5. In a drawing frame, means to apply pressure to parallel top rolls comprising an outer saddle engaging the front and back rolls, an innersaddle engaging the two middle rolls, a single pressure-applying device, means to distribute the pressure in predetermined proportions to said outer and inner saddles, and means to change said proportions.

6. In a drawing frame, means to apply pressure to parallel top rolls comprising an outer saddle engaging the front and back rolls, an inner saddle engaging the two middle rolls, a single pressure-applying device, means to distribute the pressure in predetermined proportions to said outer and inner saddles, and means to vary the ratio of the pressures supplied to the rolls engaged by each saddle.

'7. In a drawing frame, an outer saddle, an inner saddle, a single pressure-supplying device, a transmitting member pivotally connected to the inner saddle and having a contact element operatively engaging the other saddle and distributing the supplied pressure in predetermined proportions between said saddles, and means to adjust the pivotal connection to said inner saddle to change the ratio of pressures applied to the two ends of the inner saddle.

8. In a drawing frame, means to apply pressure to parallel top rolls comprising an outer saddle engaging the front and back rolls, an inner saddle engaging the two middle rolls, a single pressure-applying device, means to distribute the pressure in unequal predetermined proportions to said outer and inner saddles, and means to adjust the point of application of pressure to the outer saddle longitudinally of said saddle to change the ratio of pressures applied to the front and back top rolls.

9. In a drawing frame, an outer saddle, an inner saddle, a single pressure-supplying device, a transmitting link connected to said device, a cam lever pivoted on said link and manually movable to apply or release pressure on said saddles, a contact plate engaged by said lever and supported on said outer and inner saddles respectively, and means to shift the point of support of said plate on said outer saddle.

10. In a drawing frame, an outer saddle, an inner saddle, a single pressure-supplying device, a transmitting link connected to said device, a cam lever pivoted on said link and manually movable to apply or release pressure on said saddles, a contact plate engaged by said lever and supported on said outer and inner saddles respectively, and means to shift the point of support of said plate on said outer saddle without changing the point of support of said plate on said inner saddle.

11. In a drawing frame, an outer saddle engaging front and back rolls, an inner saddle engaging two middle rolls, a single pressure-supplying device, a transmitting member effective to distribute the supplied pressure in predetermined proportions to said outer and inner saddles, and means to independently change the point of application of pressure to said outer saddle to vary the relative pressures applied to the front and back top rolls.

1'2. In a drawing frame, means to apply pressure to four parallel top rolls comprising an outer saddle engaging the front and back rolls, an inner saddle engaging the two middle rolls, a single pressure-applying device, means to distribute the pressure in predetermined proportions to said outer and inner saddles and in unequal proportions between the rolls engaged by each saddle, means to vary the relative pressures applied to said saddles, means to vary the relative pressures applied to the front and back rolls, and means to vary the relative pressures applied to the middle rolls.

13. In a drawing frame, an outer saddle, an inner saddle, a single pressure-supplying device, a bearing bracket, means to adjust said bracket on said inner saddle, a transmitting member pivoted on said bracket, a bearing block mounted on said member and engaging said outer saddle, means to adjust said block along said member and longitudinally of said outer saddle, a second transmitting member operatively connected to said pressure-supplying device and engaging said first member, and means to adjust said second member longitudinally of said first member and outer saddle.

14. In a drawing frame, means to apply pressure to five parallel top rolls comprising an outer saddle engaging the front roll and transmitting pressure for the two back rolls, an inner saddle engaging the two middle rolls, a single pressureapplying device, and means to distribute the pressure in predetermined proportions through said outer and inner saddles to all of said top rolls, said outer saddle directly engaging the front top roll and a back saddle being interposed between the rear end of said outer saddle and the two back top rolls. 7

15. In a drawing frame, means to apply pressure to parallel top' rolls comprising an outer saddle transmitting pressure to the front and back rolls, an inner saddle engaging two middle rolls, a single pressure-applying device, and means to distribute the pressure in predetermined proportions to said outer and inner saddles.

CLARENCE E. OLNEY. 

